xPlugins are Max for Live devices that bring extra features for VST management in Ableton Live.

Features:
1) Allows access to more than 128 parameters (Ableton’s limit is 128)
2) All available parameters are mapped automatically
3) Controls open/close of plugin window
4) Allows saving of preset as an adv file, instead of saving inside a rack
5) Where available, enables switching of program change – to change presets on a VST